Question about Jeep Cars & Trucks
I have replaced alternator checked all fuses and alarm system and still have slow drain on battery --battery is new also. it usually takes about 1-2 days and battery is dead any ideas?
Try this, disconnect the alternator and see if it still drains the alternator, you say new but i know it is rebuilt, and some rebuilders do a terrible job, this is esp true of the so called discount auto parts stores (that is a joke as they often charge more than a dealer) such as O'reilly and others. Buy a Mopar rebuilt if the alternator turns out to be the source of the battery draw down. Also make sure no light inside the truck are on like sun visor lights and so on. Have the battery tested shorted cells cause a draw and will kill the battery overnight, don't over testing new parts as they can be bad, found this out the hard way early in my mechanical career.
Posted on Nov 01, 2012
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Posted on Jan 02, 2017
If you connect a 12VDC test light in line, between your + battery post & + battery cable,(cable off battery obviously) the light will stay lit brightly as long as there is a draw. Keep in mind your radio will cause some due to memory function, clock etc. Pull stereo/radio fuse to eliminate that draw, then start removing fuses, and putting them back, watch light. If it dims, or goes out, you've found the source of your current draw. I have had to resort to pulling them all,(after making notes for anything I needed to remember about where they were) to get light to go out, then re-installing one by one & watching light. When it comes on nice & bright, note which fuse slot, and pull it back out and continue on, in case of more than one draw.
Posted on Mar 01, 2009
Hellokrissypoo4...Your navigator has what is known as a parasitic battery drain...meaning, something in the vehicles system is not turning off...here is the way i test for this, you will need a digitial multimeter to perform this test...when doing this test make sure that the dome light, under hood light, trunk light, etc. are OFF.
Posted on Jul 22, 2009
Disconnect battery from vehicle overnight to check for internal battery drain.......just take one of the cables off.
If the battery is still up and starting the vehicle after being disconnected after a day or two......the drain IS in the vehicle and will have to be checked again.
Do it yourself.
Buy a cheap 12 volt test light.
Place it between the cable you removed before.
One end on the battery post and the other on the cable end.
Now....with the key off......
If the light glows brightly....you have TOO MUCH drain.
We want a dim glowing light.
The dim light is just the memory circuits in the electronics and OK.
With the doors closed....take out one fuse at a time until the light glows dim.......the fuse that dims the light is the problem circuit.
If no fuse dims the light...remove relays one at a time.
Remember....some fuses and relays could be in the engine compartment and under the dash.
If no relay dims the light disconnect ALL alternator wires.
Remember....anything that uses power will make the light glow ....keep those doors closed (we do not want interior light drain affecting the test ) and if you have a under hood light check it first by removing the bulb.
We do not want false readings.
Posted on Sep 22, 2009
Disconnect battery ground for 30 seconds & reconnect. Light should be out unless you have deeper diagnostic problem. Charging system good Battery good. This action should reset trouble light. Good luck!
Posted on Dec 29, 2009
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